Mercury - Snap-Fit Strainer Cooling System Protection Durable Polymer 8M0061328. Overview. Anyone who spends time on the water knows that peace of mind often comes from the small things - the parts you rarely see, but absolutely depend on. The Mercury 8M0061328 Snap-Fit Strainer is one of those quiet, essential components. It sits tucked away in your cooling system, doing the steady, unglamorous work of keeping debris out so your engine can stay cool, consistent, and reliable. When you're naviga